DSXchange

hi,

in parallel jobs modify stage, one of the option is keep column.. what is use of keep column.. give me some explanation with small example

Thanks in Advance....

Why not just read the chapter on the Modify Stage in the Parallel Job Developer's Guide pdf? Got examples and everything.

Any columns you don't KEEP or otherwise derive are dropped.

Any columns you don't DROP are kept.

The two are mutually exclusive, a point which is not well made in the Parallel Job Developer's Guide manual but is well made in the Orchestrate Operators manual.

Hi, in modify we can perform drop column. keep column . these manipulations we can perform in transform stage, then what is need of this modify stage especially.. Please clarify ..

Thank you,

Modify stage does not create extra processes. It runs on the output link of the previous stage. So it would be slightly faster than a transformer. AFAIK, the RCP option in each stage also creates a modify operator to propagate or drop the columns.